Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tong luc son snippets" » "dong luc son snippets", "tong cuc son snippets", "truong luc son snippets", "tong lac son snippets", "tong luc sang snippets", "tong quoc son snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("tong luc son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tong luc son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tong luc son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tong luc son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.